Over a distance of 3 cm an electron accelerates uniformly from a speed of 9 x 103 m/s to a speed of 6 x 106 m/s. How long does it take the electron to cross this distance?
2. Relevant equations
d = 1/2(v0 + v)t
3. The attempt at a solution
d = 3 cm /10 cm = 0.3 m
2 d / v0 + v = t
2 (0.3 m) / (9 x 103 m/s + 6 x 106 m/s) = t
This is where I got a little lost, especially with trying to do it on paper as I’m not able to use a calculator for the test.